Convotherm OEB Series Service Handbook page 42

Service Handbook OEB/OES/OGB/OGS
2.5.4b Convection in units with direct injection (OES/OGS)
active in this cooking programme
=
not active in this programme
=
can be active
=
i
Information:
In the convection programme, the oven is heated only via the convection heating
11 / convection heat exchanger 6.
Activating and deactivating of the heating / the burner is controlled by the oven
temperature probe B6, this activates the convection heating 11 via K4... and K6...,
whenever the temperature drops below the preset temperature. In gas units, the
activating and deactivating of the convection burner 6 is controlled by the
automatic firing N20 / N22.
The fan motor 12 will switch on and off in this programme via the K5 and K50 in the
selected temperature value range of 30 °C - 99 °C in pulse. With a constant
activation time of the fan (normally 2 seconds), the pause time can be extended
from the default value of 60 seconds to 240 seconds, depending on the oven
temperature.
The programme is stopped automatically when the time or the pre-set CTC (Core
temperature probe B10 ) temperature is reached.
In the convection programme, the demoisturizing 9 can be activated.
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Information: Preheat programme
Mr. C can call up a special preheating programme on the menu. In this
programme, the selected preheating temperature will be reached with convection
heating. The timer begins running after the selected temperature has been
reached. Thereby maintaining a continuous and even preheating, independent of
the starting conditions.
AS/11-2011
1 = Pressure compensation valve
2 = Fan wheel
3 = Oven chamber
4 = Steam and air circulation
5 = Bypass pipe
6 = Convection heat exchanger
7 = Demoisturizing tub
8 = Hydraulic seal in condenser
9 = Demoisturizing nozzle
10 = Condenser cooling
11 = Convection heating
12 = Fan motor
13 = Pressure regulator
14 = Manometer
15 = Pressure switch (water)
16 = Reducer nozzle
17 = Water injection distributor
18 = Injection nozzle
B3 = Condenser temperature probe
B5 = Bypass temperature probe
B6 = Oven temperature probe
B10 = Core temperature probe
Y1 = Solenoid valve "condenser cooling "
Y2 = Solenoid valve " demoisturizing "
Y4 = Solenoid valve direct injection
2_05_04e_Convection_b
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